Impact Factors Analysis of Irrigation Water Use Efficiency in Hairisu Rice Irrigation Area

Based on the Hairisu grassland irrigation area in Inner Mongolia ChiFeng as the background,the irrigation water use efficiency of rice,which is one of the largest water demand crops in the irrigation area,are analyzed and tested.In different baseline years,the objective evaluations of water-saving irrigation mode,the development status and the construction status of water-saving irrigation engineering are conducted.The conclusions are as following:the water-saving irrigation investment,the channel lining rate and the rice planting area ratio are determined as the positive and negative factors of irrigation water use efficiency according to the principal component scores;the impact of natural factors is relatively small.The multiple linear regression models are also established.It is pointed out that the research on prediction model for irrigation water use efficiency should be carried out to promote planning and saving of water-use.